Custom property values for BorderThickness and BorderBrush are replaced after button click.

To reproduce, use the following code, you'll see that a highlighted border appears after clicking the button.

<telerik:RadButton Background="Gray"
                           Foreground="White"
                           BorderThickness="0"
                           BorderBrush="Transparent"
                           Content="click me"
                           HorizontalAlignment="Center"
                           VerticalAlignment="Center" />

Reason for declination: 
The border that you see is the focused state of RadButton, which is a separate visual and its BorderThickness is not template-bound to the BorderThickness of the control intentionally. We believe that a control should have focus even if its default border is removed. In our latest themes we are trying to keep this behavior. In the Office2016 theme there is an exposed palette property, which you can use in code-behind if you want to remove the focus: 
Office2016Palette.Palette.FocusThickness = new Thickness(0);

Implement mechanism that allows positioning the drop down content of RadDropDownButton when the DropDownPlacement property is set to Absolute or Relative. Something like DropDownHorizontalOffset and DropDownVerticalOffset.

MouseLeave event is never fired after we change the Them of the controls from a control located in the DropDownContent. Therefor the controls IsMouseOver property is true and looks like it is hovered.

Arg_COMException in some cases when used with RoutedUICommand

Update the Buttons AutomationPeer to use the AutomationProperties attached properties.

As a workaround you can create a custom button control deriving from RadButton. That would allow you to create a custom AutomationPeer class that can return the AutmationProperties.Name value to a narrator application

*  3 Image properties (normal, hover, disabled)
 *  showBorder/flat true/false (Essentially making only the image appear as a button)
 *  if the 3 images are not set then the visual state manager should modify the image to appear disabled or hover with a highlight / mask overlay (or whatever the proper term is).

When a RadMenu/RadContextMenu is used as DropDownContent of a SplitButton/DropDownButton, the DropDownContent  cannot be closed after sub menu items are displayed

Should work the same as the RadContextMenu. 
Also add support for setting effect (DropShadow... ) to the Dropdown itself.

Make the image inside the buttons to be aware of the FlowDirection.

Add Closing event.

Implement functionality similar to http://demos.telerik.com/aspnet-ajax/button/examples/togglebutton/defaultcs.aspx

SplitButton throws a design time exception with implicit styles if you've included Diagrams.Extensions.xaml

DropDownButton's DropDownContent blinks when its template and its parent's ControlTemplate are changed at runtime

Add a visual representation for the IsDefault property like in Microsoft's button.

It should be possible to specify whether the drop down should stretch to the width of the button or whether it should be left - right aligned. The same should apply for the vertical positioning when the popup appears left or right of the button.

In that way it will be easy to set the popup animation to be slide, fade or scroll without setting a custom template. 

Available in R1 2017 Release

There is a Dispatcher call without checking in the dispatcher call for NULL. This lead to NullReferenceException in huge production code.



Available in R3 2016 SP

The issue can be reproduced with DatePicker inside of ComboBoxItem ItemTemplate.

Available in LIB Version 2016.3.1010, it will be also available in the 2016 R3 SP1.

Close the DropDown popup when clicking on the DropDownContent in DropDownButton.

Available in R3 2016 Official Release.